Just our of curiosity, were you running a surge protector/power center on your HR34? It doesn't take much to fry a hard drive regardless of what it is installed in. Also, the HR34 has the largest hard drive yet in any DVR that Directv has put out. As the hard drive size increases, the number of platters increases, and the space between those platters narrows the failure rate increases.
Directv has kind of created a problem. Is the HR34 a media center/video server or is it just a time shifting devise? If it is a video server then they need to rethink what they are doing and increase the size of the storage capacity, give us a way to back it up, and give us a way to use that back up on another DVR. Yes, I am aware you could run a RAID box off of the eSata port but the cost of the RAID box and storage devices would be extravagant. If it is a time shifting devise then a 500 GB hard drive is more than large enough and there is no need to worry about if it fails. Anything recored/lost can probably be replaced.
IMHO, the whole problem is the bean counters at Directv who are trying for maximum profit by producing minimum equipment for Ma and Pa Kettle average consumer and not the power users/geeks here on DBS.